Games like Terra Machina
Games like Terra Machina include Factorio, Satisfactory, Terraria, Forager, and The Last Caretaker. We matched them by the tags players give Terra Machina on Steam (Sandbox, Automation, Resource Management, Action, and Base Building): closest matches first, and among equally close ones the better-known games.

Factorio
Shared: Automation · Sandbox · Resource Management

Satisfactory
Shared: Automation · Base Building · Sandbox

Terraria
Shared: Sandbox · Pixel Graphics · 2D

Forager
Shared: Sandbox · Pixel Graphics · Resource Management

The Last Caretaker
Shared: Automation · Sandbox · Base Building

shapez
Shared: Automation · Sandbox · Resource Management

Mindustry
Shared: Automation · Resource Management · Base Building

Core Keeper
Shared: Sandbox · Exploration · Pixel Graphics

Stardew Valley
Shared: Pixel Graphics · Sandbox · Relaxing

Hydroneer
Shared: Automation · Sandbox · Base Building

Oxygen Not Included
Shared: Resource Management · Base Building · Sandbox

Starbound
Shared: Sandbox · Pixel Graphics · Exploration

Dyson Sphere Program
Shared: Automation · Resource Management · Base Building

Outpath
Shared: Automation · Sandbox · Base Building

Nova Lands
Shared: Automation · Sandbox · Base Building

Stationeers
Shared: Automation · Base Building · Sandbox

Necesse
Shared: Sandbox · Pixel Graphics · Crafting

Sandustry
Shared: Sandbox · Automation · Exploration

FOUNDRY
Shared: Automation · Base Building · Sandbox

Potion Craft: Alchemist Simulator
Shared: Sandbox · Resource Management · Relaxing

The Planet Crafter
Shared: Base Building · Automation · Sandbox

StarRupture
Shared: Automation · Base Building · Exploration

Flotsam
Shared: Sandbox · Base Building · Resource Management

ASTRONEER
Shared: Sandbox · Exploration · Base Building